<!DOCTYPE html>
<html>
	<head>
		<meta charset="utf-8">
		<title></title>
		<link rel="stylesheet" type="text/css" href="css/bootstrap.css" />
		<!-- 一定先引入jq -->
		<script src="js/jquery-1.10.1.js"></script>
		<script src="js/bootstrap.js"></script>
		<style>
			
			.container {
				background-color: #0062CC;
			}
			
			.container-fluid {
				background-color: #121416;
			}
			div {
				border: 1px solid #000000
			}
		</style>
	</head>
	<body>
		<div class="container">
			固定宽度
			1111
		</div>
		<div class="container-fluid">
			2222
			百分比
		</div>
		
		<div class="container">
		  <div class="row justify-content-md-center">
		    <div class="col col-lg-2">
		      1 of 3
		    </div>
		    <div class="col-md-auto">
		      Variable width content
		    </div>
		    <div class="col col-lg-2">
		      3 of 3
		    </div>
		  </div>
		  <div class="row">
		    <div class="col">
		      1 of 3
		    </div>
		    <div class="col-md-auto">
		      Variable width content
		    </div>
		    <div class="col col-lg-2">
		      3 of 3
		    </div>
		  </div>
		</div>
	</body>
</html>
